Yen Sid is a teacher of Weird Science at Dragon Hall on the Isle of the Lost. He went there on King Beast's request to teach the villain kids. He is also the founder of the Anti-Heroes Club. Yen Sid is originary form the segement "The Sorcerer's Apprentice" from the 1940 animated film Fantasia.
Yen Sid was a powerful sorcerer who had an apprentice, Mickey Mouse. When Yen Sid left, his apprentice later took his hat to learn magic from himself, after Mickey brings a broom to life and to do his job. It ended up filling the whole room with water. Yen Sid returns an stops the chaos and realizes that it was his apprentice's fault and sends him back to work.
Yen Sid resides on the Isle of the Lost as the science professor of Dragon Hall. He was sent on behalf of King Beast to teach the next generation of villains how to live without magic and using science instead. Despite leaving Auradon, Yen Sid takes the obligation in stride and eagerly teaches the students, good or bad.
Yen Sid founded the Anti-Heroes Club after the four villain kids settled down in Auradon. When unseasonal earthquakes and storms occur around Auradon, Yen Sid sensed a powerful source of the magic underground and had his kids send messages to lure the four back. Once returned, Yen Sid told them what he'd learned and urged them to find the Talismans before they land in the wrong hands, while also giving them important advice.
Trivia[]
His name is "Disney" spelled backward.
He volunteered to live on the Isle of the Lost to teach the kids the magic of science at Dragon Hall.
With his confirmed appearance, it would be revealed that the character Mickey Mouse (also known as Sorcerer Mickey) exist in the Descendants universe since Mickey was his apprentice.
The apprentice job was originally given by Dopey in early production of the film.
The dirty look he gives Mickey after he takes back his hat is known as "The Dirty Disney Look", which was the look that Walt Disney gave his animators when he disapproved of their work.
It can be assumed that Yen Sid returned to the isle after the Barrier was broken.
In the novel The Isle of the Lost it is mentioned that Yen Sid had traded his sorcerer's robes for a chemist's white coat in which he taught classes. In the graphic novel adaptation, however, he is shown in his original blue robe.
